Lubricant filter



ni- A" June 12, 1956 J, M HILBISH 2,750,048

` LUBRICANT FILTER Filed April 16, 1953 9 l. Z ,l1-wl.

2Q ZZZ i Z J3 United States,Y Patent O LUBRICANT FILTER Joseph M.Hilbish, Ashville, N. Y.

Application April 16, 1953, Serial No. 349,190

3 Claims. (Cl. ZIO- 183) This invention relates generally to filters forinternal combustion engines and more particularly to an improved mannerof mounting a replaceable lter pack within a casing.

The oil filter on the present day automobile consists of a metal casingwithin which a cartridge is seated. All or portions of the oilcirculating through the lubricant system is required to pass through thecartridge before being returned to the oil reservoir for recirculation.An ordinary roll of toilet tissue has been employed asa cartridge insuch filters and the oil is circulated through the full length of theroll which is mounted between fixed seats in the casing. Although theordinary roll of toilet paper provides a considerable amount offiltering surface and an excellent absorbent, it is not sufficientlydense to remove a proper proportion of the foreign material from the oilthat it is capable of removing owing to the fact that the leaves of aroll of this character of tissue is too loosely wound.

In order to overcome this deficiency, it is the principal object of thisinvention to provide an expansion means for the purpose of expanding thecore of the roll so that the paper may be compressed against the sidewalls of the container and produces a filter that will take out minuteforeign particles circulating therethrough. By compressing the wholeroll radially from the core outwardly in all directions against thecasing, a materially improved filter is obtained. To obtain theseadvantages, it is necessary to provide a casing in which the ordinarytoilet paper roll may be readily inserted Without providing anymoreclearance than necessary between the perimetral surface of the roll andthe inner cylindrical wall of the casing. A grid may be placed in thebottom to allow for the unrestricted flow of the oil passing through theroll. An expanding member, preferably frusto conical in shape, isinserted in the core for the purpose of breaking the central paper tubeand permitting the paper roll to be compressed against the sides of thecasing by pressure equal in all directions. This conical expansionmember also closes the core and is held in position by a spring which iscompressed against the under side of the lid of the casing. The springprovides constant pressure when the cover or lid is mounted on thecasing to maintain the conical expander in place and the tissue paperroll properly seated. The oil inlet extends through the side of thecasing above the paper roll and its upper end is wholly exposed to theoil supplied to the casing. The oil outlet is at the bottom of thecasing, the oil being collected from under a grid on which the lower endof the paper roll rests. Thus both ends of the paper roll are fullyexposed while functioning as a filtering cartridge unit and the springcontinually exerts pressure to maintain expansion of the roll againstthe side of the casing and also maintain the roll seated on the grid. Inthis manner a density to the roll of tissue is maintained for properlyfiltering the oil passing therethrough.

The cover for the casing may be held by an upwardly e t 1C@ extendingstud secured to the bottom of the casing and passing upwardly throughthe lid and being provided with threads to receive a wing nut forholding the lid in place and for exerting pressure on the spring. Againthe lid may be provided with threads to secure it with cornplementarythreads on the casing for the purpose of holding the lid in place andproviding pressure against the spring to hold the tissue roll seated andexpanded against the casing wall.

Other objects and advantages appear hereinafter in the followingdescription and claims.

The accompanying drawings show for the purpose of exemplilicationwithout limiting the invention or claims thereto, certain practicalembodiments illustrating the principles of the invention wherein:

Fig. l is a view in vertical section illustrating this invention. v A

Fig. 2 is a view in horizontal section taken on the line of 2-2 of Fig.l showing the grid upon which the paper roll is seated.

Fig. '3 is a perspective view of the wedge member as shown in Fig. l.

Referring to the drawings, 1 represents the casing which is supported bya circular clamping band 2 that is pro vided with an opening 3 forreceiving a mounting bolt for the purpose of clamping the same to thevehicle. The band 2 may be welded or otherwise permanently secured tothe casing but capable of flexing for mounting. The casing provides achamber 4 having at the lower end a grid member 5 as illustrated in Fig.2, which is provided with a series of radially disposed land members 6.The grid member S is seated on the arcuate portion 7 of the bottom 8 ofthe casing allowing thereunder a free space 10 through which to drainthe oil to the outlet 11. The inner ends of the radial land members 6 ofthe grid 5 are provided with depending feet 12 that support the innerdiameter of the grid 5 from the bottom 3 of the casing 1. The casing maybe made of a metal such as steel or it may be made of plastic. The grid5' may likewise be made of plastic and the lands thereof provide asurface 13 on which the roll of tissue 14 rests. The tissue roll is anordinary roll of toilet paper and is provided with a paper core member1S which has been split by the conical expanding member 16 which hasbeen driven a considerable way into the paper core 15 causing the tissueroll to be expanded for one-half to three' fourths of its length againstthe inner perimetral wall surface of the casing 1. The conical expandingmember 16 being larger at the top, expands the upper end of the tissueroll to greater degree than the intermediate or lower portion of theroll. This catches the heavy as well as the fine particles at the top ofthe roll and most of the heavy particles cannot even enter the tissueroll. The conical expanding member is provided with an inner bearingsection 17 that slides over the central clamping bolt 18. The upper endof the expanding member is dished out as indicated at 2i) and isprovided with a at seat 21 to receive the sealing Washer 22. The washer22 seals the bore of the sleeve 17 with the bolt 18 and is held in placeby the seating of the lower end of the helical spring 23 thereon. Theupwardly open chamber 20 of the expanding member may be vented by theopenings 24.

The upper end of the helical spring 23 engages in the seat 2S in theunderside of the lid 216 of the casing and bears against the secondsealing washer 27 positioned in the seat 2S. Bolt 18 extends up throughthe lid 26 and is threaded to receive the wing nut 28 for the purpose ofclamping the lid member 26 to the casing 1. An annular seal 30 isprovided to engage the upper edge of the casing 1 for the purpose ofsealing the lid. Thus the casing is properly sealed to function as apressure vessel and the oil delivered thereto through the pipe and inletconnection 31 is free to flow over the whole of the top surface of theroll as indicated at 32. The expansion member 16 being impervious toroll does not allow any oil to pass down through the central portion ofthe roll and the oil is forced to flow through the tissue roll in itscompressed condition against the sides of the casing. This permits theuse of an ordinary tissue roll and increases its filteringcharacteristics materially over the condition which would be normallypresent when no compression is placed on the roll forcing it radiallyagainst the intcrperinietral surface of the casing 1.

The conical expanding member 16 is provided with knife edges asindieated'at 3:3 and 34 on opposite sides thereof adjacent the smalldiameter. As shown in Fig. l these knife edges slit the inner heavypaper core i5 causing it to open and permit the tissue roll to 'ne moreuniformly expanded against the inner wall of the chamber.

While for clarity of explanation, certain embodiments of this inventionhave been shown and described, it is to be understood that thisinvention is capable of many modifications and changes in theconstruction and arrangement of. parts and certain parts and steps maybe employed without the conjoint use of other parts and steps andwithout departing from the spirit and scope of this invention.

claim:

l. An oil tlter comprising a cylindrical casing closed at one end andprovided with an oil discharge, a tissue roll having a central opening,a seat on the inner surface a of said closed casing end to receive andsupport one end of said tissue roll Without blocking or interfering withthe flow of oil axially between the leaves making up the tissue roll tosaid discharge, a cover closing the other end of said casing to seal thesame, an oil inlet in said casing above said tissue roll, and a frustoconical pressure plug member closing and seated in one end of thecentral opening of. said tissue roll, spring means seated on said frustoconical pressure member to constantly force the latter into the centralopening and expand the tissue roll radially laterally against the innersurface of the casing to the extent of its insertion thereinto.

2. The structure of claim l characterized in that said spring means iscompressed between the cover and said frusto conical pressure plugmember.

3. The structure of claim l which also includes knife means on saidfrusto conical pressure member to slit the central opening of the tissueroll to aid the spring means acting vthrough the frusto conical pressuremember in forcing the roll radially against the inner surface of thecasing.

References Cited in the le of this patent UNITED STATES PATENTS1,249,724 Davis V Dec. ll, i917 1,753,809 Short Apr. 8, 1930 2,072,393Briggs Mar. 2, 1937 2,086,739 Reed July i3, i937 2,128,589 Manning Aug.30, 1938 2,168,125 Hum Aug. l, i939

